摘要：We analyze the orbital parameters of the recently discovered exoplanet candidate Proxima c using a combination of its spectroscopic orbital parameters andGaiaDR2 astrometric proper motion anomaly. We obtain an orbital inclination ofi = 152 ± 14 deg, corresponding to a planet mass ofmc= 12−5+12M⊕, comparable to Uranus and Neptune. While the derived orbital parameters are too uncertain to accurately predict the position of the planet for a given epoch, we present a map of its probability of presence relative to its parent star in the coming years.
关键词：enastrometryplanetary systemsplanets and satellites: individual: Proxima cproper motionscelestial mechanicsplanets and satellites: fundamental parameters
